org.apache.flink.streaming.connectors.kafka

Enum FlinkKafkaConsumer.FetcherType

java.lang.Object

java.lang.Enum<FlinkKafkaConsumer.FetcherType>

org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer.FetcherType

All Implemented Interfaces:

Serializable, Comparable<FlinkKafkaConsumer.FetcherType>

Enclosing class:

FlinkKafkaConsumer<T>

public static enum FlinkKafkaConsumer.FetcherType
extends Enum<FlinkKafkaConsumer.FetcherType>

The fetcher type defines which code paths to use to pull data from teh Kafka broker.

Enum Constant Summary

Enum Constants

Enum Constant and Description
LEGACY_LOW_LEVEL The legacy fetcher uses Kafka's old low-level consumer API.
NEW_HIGH_LEVEL This fetcher uses a backport of the new consumer API to pull data from the Kafka broker.

Method Summary

Methods

Modifier and Type	Method and Description
static FlinkKafkaConsumer.FetcherType	valueOf(String name) Returns the enum constant of this type with the specified name.
static FlinkKafkaConsumer.FetcherType[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

LEGACY_LOW_LEVEL

public static final FlinkKafkaConsumer.FetcherType LEGACY_LOW_LEVEL

The legacy fetcher uses Kafka's old low-level consumer API.

Use this fetcher for Kafka 0.8.1 brokers.

NEW_HIGH_LEVEL

public static final FlinkKafkaConsumer.FetcherType NEW_HIGH_LEVEL

This fetcher uses a backport of the new consumer API to pull data from the Kafka broker. It is the fetcher that will be maintained in the future, and it already handles certain failure cases with less overhead than the legacy fetcher.

This fetcher works only Kafka 0.8.2 and 0.8.3 (and future versions).

Method Detail

values

public static FlinkKafkaConsumer.FetcherType[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (FlinkKafkaConsumer.FetcherType c : FlinkKafkaConsumer.FetcherType.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static FlinkKafkaConsumer.FetcherType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null